package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.apache.tomcat.util.security.MD5Encoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    private static final Logger log = LoggerFactory.getLogger(EmployeeServiceImpl.class);
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }


        //将密码使用md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //密码比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void insert(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        //一个一个set很麻烦，可以使用对象属性拷贝，前提是属性名得一致
        BeanUtils.copyProperties(employeeDTO, employee);
        //默认密码

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        employee.setStatus(StatusConstant.ENABLE);

        //employee.setCreateTime(LocalDateTime.now());

        //employee.setUpdateTime(LocalDateTime.now());

        //
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());


        employeeMapper.insert(employee);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {

        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> p = employeeMapper.list(employeePageQueryDTO.getName());

        return new PageResult(p.getTotal(), p.getResult());
    }

    @Override
    public void modifyStatus(Integer status,Long id) {
        Employee employee= new Employee();
        employee.setId(id);
        employee.setStatus(status);
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Long id) {

        return employeeMapper.getById(id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {

        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee );

        //employee.setUpdateUser(BaseContext.getCurrentId());
       // employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }

    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //这里文档说的id必须传，但是前端实际上并没有传，所以只能通过ThreadLocal获得
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());

        Employee employee=employeeMapper.getById(passwordEditDTO.getEmpId());
        String oldPassword=passwordEditDTO.getOldPassword();

        //密码错误
        if(!employee.getPassword().equals(DigestUtils.md5DigestAsHex(oldPassword.getBytes()))){
            throw new PasswordErrorException();
        }

       employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        employeeMapper.update(employee);
    }


}
